Well i'm not a fan of telling a dev how he should do his game, if he thinks a rework for Eiko is necessary because he has some problem regarding her and it may be important for the story going forward...
That being said, i agree that reworks are way too common and most of the time not worth it, makes sense if you finished the game and want do some polishing, but not in the middle of it.
I also doubt i will like Eiko more after whatever the dev does, Eiko and Valentina are on the bottom of my list and honestly i have no interest in playing either of their paths.